Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 12098 result(s) returned

Vertical line definition. (Coordinate Geometry)
An interactive applet and associated web page that show the definition of a vertical line in coordinate geometry. The applet has two points that the user can drag which define a line. The line flagged when it is vertical (slope=undefined). The grid, details and coordinates can be turned on and off. The applet can be printed exactly as it appears on the screen to make handouts. The web page has a discussion on how to test for vertical and has links to other pages relating to coordinate geometry.
Author(s): John Page

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Cube definition and properties
An interactive applet and associated web page that demonstrate the properties of a cube. A 3-D cube is shown in the applet which can be interactively manipulated using the mouse. Research has shown that some younger students have difficulty visualizing the parts of a 3D object that are hidden. To help with this, the student can rotate the cube in any axis simply by dragging it with the mouse. It can also be 'exploded' - where a slider gradually separates the faces to reveal the ones behind. The
Author(s): John Page

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Perimeter of a polygon
A web page and interactive applet show how to compute the perimeter of a polygon. A polygon is shown that can be resized by dragging its vertices. As you drag, the perimeter is continuously recalculated. Text on the page explains that the perimeter is the sum of the sides. For those who prefer it, in a formula that is given. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference interactive geometry reference book pr
Author(s): John Page

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Perimeter of a rectangle
A web page and interactive applet show how to compute the perimeter of a rectangle. A rectangle is shown that can be resized by dragging its vertices. As you drag, the perimeter is continuously recalculated. Text on the page explains that the perimeter is the sum of the sides. For those who prefer it, in a formula that is given. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference interactive geometry reference boo
Author(s): John Page

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Triangle similarity, ratios of area
An interactive applet and associated web page that demonstrate that in similar triangles, the ratio of their areas is the square of the ratio of the sides. As you drag one triangle to resize it, it remains similar to another and the ratios of sides and areas is calculated as you drag. One can be seen to be the square of the other at all times. A slight 'snap-to' effect allows easy selection of integer ratios (2:4 etc). Applet can be enlarged to full screen size for use with a classroom projector
Author(s): John Page

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Triangle similarity, ratios of parts
An interactive applet and associated web page that demonstrate that in similar triangles, ten items are always in the same ratio to each other (perimeter, three sides, three altitudes, three medians). As you drag one triangle to resize it, it remains similar to another and the ratios of sides and medians is calculated as you drag. They can be seen to be the same at all times. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math O
Author(s): John Page

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Diagonals of a square
A web page and interactive applet show how to compute the length of the diagonals of a square. A square is shown that can be resized by dragging its vertices. As you drag, the diagonals are continuously recalculated. Text on the page explains calculation. For those who prefer it, in a formula that is given. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference interactive geometry reference book project at http://ww
Author(s): John Page

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Open Heart Surgery - What to Expect (Spanish)
This patient education program explains the experience of open heart surgery, the equipment involved, and the common sensations associated with the procedure. This is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.
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Open Heart Surgery - What to Expect
This patient education program explains the experience of open heart surgery, the equipment involved, and the common sensations associated with the procedure. This is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.
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Supercourse: Epidemiology, the Internet, and Global Health
Supercourse is a global, continuously updated repository of lectures on public health and prevention targeting educators across the world. Supercourse has a network of over 32000 scientists in 151 countries who are sharing for free a library of over 2500 lectures. Originally funded three times by NASA, and now by the National Library of Medicine, this "Library of Lectures" has been developed from passionate scientific lectures from across the world. The result is a technology for inexpensive, su
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Water Quality Acquisition
In this activity, students visit two sites to practice their field water sample collection and water quality assessment skills. They use a vertical well-water sampler and downhole water quality probes to measure groundwater conductivity, pH, and temperature at different depths in a landfill. Collected water conductivity data is contoured to map the distribution of a contaminant plume. Students then study acid mine drainage by using water quality meters to compare pH and conductivity values up an
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System Identification and Parameter Estimation
This course is about non-parametric system identification based on estimators of spectral densities and its application to open-loop and closed-loop systems. Furthermore parameter estimation for linear and non-linear systems plays an important role.
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Open Source Earth Science Curriculum Resources
The collection contains assignments and analysis for an Open Source Earth Science course for grades 9 - 10. The Open Source Earth Science course has been organized to meet the CA Science Standards for Earth Sciences in grades 9 - 10, as adopted by the California State Board of Education.
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Applied Finite Mathematics
This module contains all 10 chapters of the Applied Finite Mathematics open textbook by Rupinder Sekhon. NOTE: This book is a work in progress and has not yet been marked up in CNXML. You can download individual chapter files from their respective modules.
Author(s): Rupinder Sekhon

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Species Diversity, Island Biogeography, and the Design of Nature Reserves
This field and laboratory investigation is an open-ended exercise designed to test predictions from island biogeography theory using various-sized fragments of leaf litter arthropod communities as "island" systems. Litter islands are constructed in a deciduous forest and students collect samples of leaf litter and extract arthropods using the Berlese Funnel technique. After arthropods are collected, students learn identification techniques, compute diversity indices, construct dominance-diversit
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Using Ant and Butterfly Pollination to Involve Students in Scientific Exploration
Students explore pollination using two exercises: an ant- and a butterfly-activity. In the ant-exercise, students generate hypotheses for why reports of ant pollination are rare, test one or more hypothesis, and present their findings. In addition to this open-ended inquiry investigation, instructions ...
Author(s): Mary Blaine Prince,Mary Puterbaugh

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Milstein Hall of Ocean Life
This Web site, created to complement the Hall of Ocean Life, looks at the cradle of life for our planet, along with its key to our future. It includes the following sections: Dioramas is an in-depth look at the Hall of Ocean Life's dioramas. They are: Andros Coral Reef, Diving Birds, Diving for Pearls, Polar Bear, Sargasso Sea, Walrus, West Indian Manatee, Northern Elephant Seal, Northern Sea Lion, Harbor Seal, Dolphin and Tuna, Sea Otter, Tiger Shark, and Sperm Whale and Giant Squid. Ecosystems
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Kids' Guide to the Birds of Central Park
An illustrated guide to birds commonly found in Central Park, and an introduction to birding for young naturalists. The guide also includes information on where to go in Central Park to see birds in various habitats: freshwater, woodlands, and open areas.
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Open Data Kit
Open Data Kit (ODK) is a suite of tools to help organizations collect, aggregate and visualize their data. Our goals are to make open-source and standards-based tools which are easy to try, easy to use, easy to modify and easy to scale.
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Occasion : interdisciplinary studies in the humanities
Occasion: Interdisciplinary Studies in the Humanities is a full-text open ejournal published from Stanford University. The journal aims to publish themed issues, each on... "a specific topic in interdisciplinary humanities". At January 2010 there is one issue freely available online, a themed issue on the topic of 'Rational Choice Theory and the Humanities'. Articles are freely available as either HTML pages or PDF files. Example articles in the first issue include: 'Speaking for the Humanitie
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